Direct computation of multiple 3D flow convergence isovelocity surfaces from digital 3D reconstruction of colour Doppler data of the flow convergence region: an in vitro study with differently shaped orifices

European Journal of Echocardiography : the Journal of the Working Group on Echocardiography of the European Society of Cardiology
X K LiD J Sahn

Abstract

Evaluation of the accuracy of direct computation of multiple three-dimensional (3D) flow convergence (FC) isovelocities by using digital reconstruction of colour Doppler data of the flow convergence region. We used a conventional ultrasound system (ATL HDI 3000) connected to a computer workstation via Ethernet link. The digital 3D datasets were directly transferred to a Silicon Graphic Imaging Octane workstation for later measurement. We generated nine pulsatile flows (20-60 ml/beat), with peak flow rates (67-180 ml/s), through three orifices (circular, rectangular and triangular, S=0.24 cm(2)). The 3D reconstructions of FC surface areas from multi-threshold velocities, including aliasing velocities were analysed to quantify the peak flow rate. For all orifices, linear regression demonstrated excellent correlation between the 3D calculated and electromagnetic flow meter recorded data. While there was a high correlation for 3D computation of flow rate from the single best Nyquist of 24 cm/s (r=0.97-0.98, SEE=7 .75-12.58 ml/s), the ability to average three threshold velocities (15, 18 and 24 cm/s) yielded an improved correlation (r=0.98-0.99, SEE=5.70-7.73 ml/s). Direct computation of multiple 3D FC isovelocities from digital rec...Continue Reading

Citations

Jul 14, 2009·Current Opinion in Cardiology·Lissa SugengRoberto M Lang
Aug 10, 2012·Current Opinion in Cardiology·Stephen H Little
Oct 16, 2015·Circulation Journal : Official Journal of the Japanese Circulation Society·Takahiro Shiota
Nov 8, 2014·The Korean Journal of Internal Medicine·Takahiro Shiota

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